rihad <rihad@xxxxxxx> writes: > Thanks! Our autovacuum_work_mem = 1GB, so this probably means any space > would be available for reuse only at the end of the vacuum? It's six bytes per dead tuple, last I checked ... you do the math. > Are there > any downsides in decreasing it to, say, 64MB? I see only pluses ) Well, usually people prefer to minimize the number of passes over the indexes. regards, tom lane